on your tail
They’re hot on your trail.
The police are after you.
Fais gaffe, t'en as un à tes trousses.
Watch out, there's one after you.
— La Guerre des étoiles (1977)
Tu as la pègre à tes trousses et tu crains ces gens-là ?
The mob is after you, and you’re afraid of those people?
— The Dark Knight : Le Chevalier noir (2008)